Chris Jacobsen's work is aimed at the development and
applications of high resolution X-ray imaging modalities. He, in
collaboration with Professor Kirz and their
students, built several scanning transmission X-ray microscopes which
make use of two beamlines at the National Synchrotron Light Source at
nearby Brookhaven National Laboratory. These microscopes use
microfabricated diffracted optics (zone plates) to focus the bright
beam of X-rays to a 50 nm spot which is used to explore the specimen.
Chemical and elemental information is gained using absorption
spectroscopy at any desired location. Wet specimens up to 10 microns
thick may be examined at room temperature or in a frozen hydrated form
at liquid nitrogen temperature to reduce radiation damage. Jacobsen
was a Presidential Faculty Fellow (NSF/White House, 1992-1997), and
received the International Dennis Gabor Award in 1996.

Schedule
of Lectures:

"Going Beyond 2D in X-ray
Imaging: high resolution in 3D, and chemical sensitivity"

"To Live and Die in L.A.
(laboratory apparatus): radiation limits for studies in biology and
soft matter"

"X-ray Focusing: how small
a spot can we make of electromagnetic waves?"